Radio inductance coil



April zo, 1926.

y 1,581,967 O. G. LISSEN RADIO INDUGTANCE COIL Filed Sept. 8, 1924 7a gf/ ATTORNEYS Patented: Apr. 210, 1926.

OLO'V GUSTOV LISSEN, OF JERSEY CITY, NEW JERSEY.

Fries.

RADIO INDUOTANCE COIL.

.Application filed September 8, 1924. Serial No. 736,595.

To all whom# may concer/n:

Be it known that I, OLov G. IaIssnN, a citizen of the United States, and a resident of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Radio Inductance Coil, of which the following is a full, clear, and exact description.

This invention relates to a new and improved radlio coil. An object of the invention is to provide a simple, efficient, durable and compact coil for radio work.

Another object concerns the provision of means whereby the wires may be wound in a compact cylinder without any necessity for using insulated wire.

A further object concerns the provision of means whereby the wire can be used in cylindrical form without the use of a core.

A still further object concerns the provision of means whereby a flexible material is used to support the wires and to insulate them at the same time.

Another object concerns the provision of means whereby the capacity of the dialectic losses are reduced to a minimum.

The invention is illustrated in the draw ings, of which- Figure l is a side elevation of the device partly in section;

Fig. 2 is a section taken on the line 2 2 of Fig. 1;

Fig. 3 is a partial enlarged section;

Fig. 4 is an enlarged section taken through a view of the wires and their support; and

Fig. 5 is a plan view of a portion of the supporting fabric.

The form of the invention shown in the drawings is a preferred form, although it is understood that modications in the construction and arrangement of the parts and in the character of the materials used may be adopted without departing from the spirit of the invention as set forth in the appended claim.

In its general aspect the invention includes an inductance coil especially adapted for use in radios made by winding a plurality of wires in cylindrical form and weaving through the wires a fabric, such as cotton or linen, in strips which will act not only as a support for the wires but will insulate the wires from each other. The ends of the fabric are then clamped or connected to a suitable framework whereby the wires and the fabric are held inv proper position. Preferably the strips of fabric are cut on the bias.

In a more specific form, the invention includes weaving a plurality of strips of fabric, such as linen, in the form of a cylindrical drum or shell with a plurality of wires which are wound at right angles to the strips, the wires running alternately over and under successive strips of fabric so that the strips of fabric will not only support the wires but will act as insulating meansfor the wires. The ends of the strips of fabric are then suitably clamped in a frame whereby the strips of the fabric are readily supported. The ends of the wires are then connected to suitable binding posts on the frame and the wires are ready for 4use as inductances, especially for radio.v

In the preferred form of the invention shown in the drawings I have illustrated a plurality of strips 10 of fabric, such as linen, preferably cut on the bias and disposed side by side in the form vof a hollow cylinder. Woven around the cylinder or fabric in a direction at right angles to the aXis of the cylinder are a plurality of wires such as 11. These wires are placed adjacent each other. One wire will pass under a given strip of fabric and the adjacent wires v will pass over any given strip. In this manner the wires and the fabric are woven together in a compact shell so that the fabric will support the wires in the form of a coil and also insulate the wires from each other e'ectively. As seen in Fig. 1, when any desired number of turns of wires are thus interwoven with the strips of fabric, such as 12, the fabric is run around the opposite wires to hold them in place and prevent them from spreading.

Preferably the fabric and the wires are supported in a frame comprising two ringlike heads 13 and 14 having tapered openings into which tapered rings 15 are adapted to fit. The ends of the strips are clamped between the rings and the head. The heads are held together preferably by stay bolts such .as 16. The ends of the Wires are connected to suitable binding posts such as 17 and 18.

It will thus be observed that I have formed a coil without a core, capable of being wound with bare wires which are interwoven with strips of flexible fabric so as to form a compact rigid coil that can 10 the strips of fabric, one Wire passing over a` particular strip and the adjacenty Wire passing` under saidy strip' whereby the strips will support the Wires and insulate them from each other, a frame Comprising a pair of' ringlike heads' having tapered apertures against kwhich the ends of the fabric are disposed, tapered rings adapted to t in said apertures to.l clamp the ends of the fabric, and means for spaeinp; the heads.

OLOV GUSTGV LISSEN. 

